CN109768925A - A kind of active/standby pseudo wires switching method and device - Google Patents
A kind of active/standby pseudo wires switching method and device Download PDFInfo
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Abstract
The present invention provides a kind of active/standby pseudo wires switching method and device, which comprises the standby PW of the first object PW, the management PW, the standby management PW and first object PW are associated with the first virtual next-hop VN；First VN includes main next-hop, slave next-hop and the first label F lag, and the main next-hop is the corresponding next-hop of the first object PW, and the slave next-hop is the corresponding next-hop of standby PW of the first object PW；When detecting the management PW failure based on BFD session, the value of the first Flag in the first VN is updated to second value by the first value.The time-consuming that active and standby PW switching can be reduced using the embodiment of the present invention, reduces the probability of packet loss in active and standby PW handoff procedure.
Description
Technical field
The present invention relates to network communication technology field more particularly to a kind of active/standby pseudo wires switching methods and device.
Background technique
In the networking (being properly termed as active and standby PW networking) of pseudo-wire (English: Pseudowire, abbreviation: PW) 1:1 redundancy protecting
In, main PW and standby PW are mutually redundant protection.Under normal circumstances, main PW is with that is, by main PW converting flow；Standby PW is as redundancy
Protection is then switched to when main PW breaks down through standby PW converting flow.
As the business PW of two service provider network edge (English: Provider Edge, abbreviation PE) equipment in networking
When quantity more (these PW each other homologous chummage PW), to reduce two-way converting detection (English: Bidirectional
Forwarding Detection, referred to as: BFD) number of sessions, it will usually (PE at both ends is set with the homologous chummage of business PW for configuration
It is standby identical, and tunnel strategy is identical (selecting the tunnel of same type)) management PW, and by the industry with the management homologous chummage of PW
Business PW and management PW is bound.By BFD session detection management PW, quick sensing failure, then all bindings are noticed by management PW
Business PW carry out active-standby switch, the flow of final service PW is switched to standby path from main path.
However realize discovery, in above-mentioned PW active-standby switch scheme, when business PW specification is larger, management PW notices all industry
Business PW, which carries out active-standby switch, will appear more serious packet loss than relatively time-consuming, in handoff procedure.
Summary of the invention
In view of this, the present invention provides a kind of active/standby pseudo wires switching method and device, to solve existing active/standby pseudo wires switching
The problem of being taken a long time in scheme, be easy to causeing packet loss.
In a first aspect, the present invention provides a kind of active/standby pseudo wires switching method, set applied to the first PE in active and standby PW networking
Standby, business PW between the first PE equipment and the 2nd PE equipment is main PW, the first PE equipment and the 3rd PE equipment it
Between business PW be standby PW, the first object PW between the first PE equipment and the 2nd PE equipment binds same management
PW, the first object PW are the identical a plurality of PW of tunnel strategy, and establishing on the management PW has BFD session, the management PW
Configured with corresponding standby management PW, the standby PW of the standby management PW and first object PW homologous chummage PW each other, the side
Method includes:
By the standby PW association of the first object PW, the management PW, the standby management PW and first object PW
To the first VN；First VN includes main next-hop, slave next-hop and the first Flag, and the main next-hop is the first object
The corresponding next-hop of PW, the slave next-hop are the corresponding next-hop of standby PW of the first object PW；
When detecting the management PW failure based on BFD session, by the value of the first Flag in the first VN
Second value is updated to by the first value；
Wherein, when the value of the first Flag is first value, the first PE equipment passes through the main next-hop
Carry out flow forwarding；When the value of the first Flag is the second value, the first PE equipment passes through the slave next-hop
Carry out flow forwarding.
Second aspect, the present invention provide a kind of active/standby pseudo wires switching device, set applied to the first PE in active and standby PW networking
Standby, business PW between the first PE equipment and the 2nd PE equipment is main PW, the first PE equipment and the 3rd PE equipment it
Between business PW be standby PW, the first object PW between the first PE equipment and the 2nd PE equipment binds same management
PW, the first object PW are the identical a plurality of PW of tunnel strategy, and establishing on the management PW has BFD session, the management PW
Configured with corresponding standby management PW, the standby PW of the standby management PW and first object PW homologous chummage PW each other, the dress
It sets and includes:
Associative cell is used for the first object PW, the management PW, the standby management PW and the first object
The standby PW of PW is associated with the first virtual next-hop VN；First VN includes main next-hop, slave next-hop and the first Flag, described
Main next-hop is the corresponding next-hop of the first object PW, and the slave next-hop is that the standby PW of the first object PW is corresponding
Next-hop；
Detection unit, for based on BFD session detection management PW whether failure；
Updating unit, for when based on BFD session detect the management PW failure when, described in the first VN
The value of first Flag is updated to second value by the first value；
Wherein, when the detection unit detects that the value of the first Flag is first value, the first PE is set
It is standby that flow forwarding is carried out by the main next-hop；When the value of the first Flag is the second value, the first PE is set
It is standby that flow forwarding is carried out by the slave next-hop.
Using technical solution disclosed by the invention, by configuring corresponding standby management PW for management PW, and management PW is tied up
Fixed main PW, management PW, standby management PW and main PW standby PW be associated with including the corresponding main next-hop of main PW, be corresponding for PW
Slave next-hop and VN for identifying the Flag by main next-hop or slave next-hop converting flow in turn can be by more
The value of Flag realizes the switching of active and standby PW in the new VN, reduces the time-consuming of active and standby PW switching, reduces active and standby PW handoff procedure
The probability of middle packet loss.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of active and standby PW switching method provided in an embodiment of the present invention；
Fig. 2 is a kind of configuration diagram of concrete application scene provided in an embodiment of the present invention；
Fig. 3, which is a kind of PW provided in an embodiment of the present invention, is associated with schematic diagram with VN；
Fig. 4 is a kind of structural schematic diagram of active and standby PW switching device provided in an embodiment of the present invention；
Fig. 5 is a kind of hardware structural diagram of active and standby PW switching device provided in an embodiment of the present invention.
Specific embodiment
Technical solution in embodiment in order to enable those skilled in the art to better understand the present invention, and make of the invention real
The above objects, features, and advantages for applying example can be more obvious and easy to understand, with reference to the accompanying drawing to technical side in the embodiment of the present invention
Case is described in further detail.
It referring to Figure 1, is a kind of flow diagram of active and standby PW switching method provided in an embodiment of the present invention, such as Fig. 1 institute
Show, which may comprise steps of:
It should be noted that active and standby PW switching method provided in an embodiment of the present invention can be applied in active and standby PW networking divide
Do not pass through the PE equipment of active and standby PW and different other PE equipment connections (referred to herein as the first PE equipment, and by the first PE equipment
It is known as the 2nd PE equipment by other PE equipment that main PW is connected, the first PE equipment is claimed by other PE equipment of standby PW connection
For the 3rd PE equipment)；Use same tunnel strategy between first PE equipment and the 2nd PE equipment (selects the tunnel of same type
Road) a plurality of PW (referred to herein as first object PW) bind same management PW, establishing on management PW has BFD session.
The standby PW of first object PW, management PW, standby management PW and first object PW are associated with the first VN by step 101；
First VN includes main next-hop, slave next-hop and the first Flag.The main next-hop is the corresponding next-hop of first object PW, standby
Next-hop is the corresponding next-hop of standby PW of first object PW.
Wherein, main next-hop and slave next-hop can reach same remote equipment.
Can be management PW with purchase PW (referred to herein as standby management PW) in the embodiment of the present invention so that management PW with
The first object PW for binding management PW equally forms redundancy protecting.
Wherein, (the standby PW of first object PW includes a plurality of PW to the standby PW of standby management PW and first object PW, in this plurality of PW
Each PW be respectively each PW in first object PW standby PW) homologous chummage PW each other.
It, can be based on the public affairs for carrying first object PW in order to reduce the time-consuming of active and standby PW switching in the embodiment of the present invention
The corresponding next-hop in net tunnel (i.e. main path) and carry first object PW standby PW public network tunnel (i.e. for path) it is right
The next-hop answered creates a virtual next-hop (English: Virtual Nexthop, abbreviation VN) (referred to herein as the first VN),
First VN may include that the corresponding next-hop of first object PW (i.e. referred to herein as lead next by the corresponding next-hop of main path
Jump), the corresponding next-hop of standby PW (i.e. for the corresponding next-hop in path, referred to herein as slave next-hop) of first object PW and
The label (Flag, referred to herein as the first Flag) in path used for identifying flow forwarding, and by first object PW, management
PW, the standby standby PW for managing PW and first object PW are associated with the first VN.
In the embodiment of the present invention, when the first PE equipment is needed through main PW or standby PW converting flow, can according to this
The value of the first Flag in one VN determine by main next-hop carry out flow forwarding (passing through main path progress flow forwarding) or
Flow forwarding (flow forwarding is carried out by standby path) is carried out by slave next-hop.
In the embodiment of the present invention, the first PE equipment will be identified and pass through the value of the first Flag of main next-hop progress flow forwarding
The value for identifying the first Flag that the first PE equipment carries out flow forwarding by slave next-hop is known as second value by referred to as the first value.
For example, the first value can be Main (master), second value can be Backup (standby).
Wherein, the value of the first Flag can be the first value.
Step 102, when detecting management PW failure based on BFD session, by the value of the first Flag in the first VN by the
One value is updated to second value.
In the embodiment of the present invention, the first PE equipment can based on BFD session detection management PW whether failure.When the first PE is set
BFD message standby to detect when managing PW failure, that such as the first PE equipment does not receive the transmission of the 2nd PE equipment in preset duration
(such as BFD control message), the first PE equipment can determine main path failure, at this point, the first PE equipment can will be in the first VN
The value of first Flag is updated to second value by the first value, in turn, when the first PE equipment needs to carry out flow (by first object PW
Or first object PW standby PW forwarding flow) forwarding when, the first PE equipment can according to the value of the first Flag in the first VN,
Flow is passed through standby path to forward.
As it can be seen that by configuring corresponding standby management PW for management PW, and management PW is tied up in method flow shown in Fig. 1
Fixed main PW, management PW, standby management PW and first object PW standby PW be associated with including the corresponding main next-hop of main PW, for PW
Corresponding slave next-hop and VN for identifying the Flag by main next-hop or slave next-hop converting flow in turn can be with
Value by updating Flag in the VN realizes the switching of active and standby PW, reduces the time-consuming of active and standby PW switching, reduces active and standby PW and cut
The probability of packet loss during changing.
Optionally, the present invention in one embodiment, the above-mentioned value by the first Flag in the first VN is by the first value
It is updated to after second value, can also include:
When detecting management PW fault recovery based on BFD session, by the value of the first Flag in the first VN by second value
It is updated to first value.
In this embodiment, when the first PE equipment, which is based on BFD session, detects management PW fault recovery, such as the first PE is set
The standby BFD message for receiving the transmission of the 2nd PE equipment, the first PE equipment can determine main path fault recovery, at this point, the first PE
The value of the first Flag in first VN can be updated to the first value by second value by equipment, in turn, when the first PE equipment need into
When row flow (passing through the flow of the standby PW of first object PW or first object PW forwarding) forwarding, the first PE equipment can be according to the
The value of the first Flag in one VN is again forwarded flow by main path.
Optionally, the present invention in one embodiment, above-mentioned active and standby PW switching method can also include:
When detecting the 3rd PE equipment fault, first object PW is associated with the 2nd VN, the 2nd VN is main next-hop.
In this embodiment, it is contemplated that when the 3rd PE equipment fault, standby PW meeting Down (closing), at this point, only main PW
Can converting flow, i.e., cannot form PW redundancy protecting, at this time, it may be necessary to re-create one only including main next-hop void it is next
It jumps (referred to herein as the 2nd VN), and main PW is associated with the 2nd VN, in turn, when the first PE equipment needs to carry out flow forwarding
When, flow forwarding can be carried out by main path.
Correspondingly, in this embodiment, when the first PE equipment detects the 3rd PE equipment fault, such as the first PE equipment is logical
It crosses public network Routing Protocol or tag distribution protocol (English: Label Distribution Protocol, abbreviation LDP) perceives
First object PW can be associated with the 2nd VN by the 3rd PE equipment fault, the first PE equipment, in turn, when the first PE equipment need into
When row flow (flow forwarded by the standby PW of first object PW or first object PW) forwarding, it can be forwarded by main path.
Optionally, in another embodiment, above-mentioned active and standby PW switching method can also include:
When detecting the 2nd PE equipment fault, the standby PW of first object PW is associated with the 3rd VN, the 3rd VN is standby
Next-hop.
In this embodiment, it is contemplated that when the 2nd PE equipment fault, main PW meeting Down, at this point, only standby PW can turn
Flow is sent out, i.e., cannot form PW redundancy protecting, at this time, it may be necessary to re-create only (this of the empty next-hop including slave next-hop
Referred to herein as the 3rd VN), and first object PW is associated with the 3rd VN, in turn, (lead to when the first PE equipment needs to carry out flow
Cross the flow of the standby PW forwarding of first object PW or first object PW) forwarding when, standby path can be passed through and carry out flow forwarding.
Correspondingly, in this embodiment, when the first PE equipment detects the 2nd PE equipment fault, such as the first PE equipment is logical
Public network Routing Protocol or LDP (English: Label Distribution Protocol, abbreviation: LDP) protocol aware are crossed to second
First object PW can be associated with the 3rd VN by PE equipment fault, the first PE equipment, in turn, when the first PE equipment is flowed
When amount (flow forwarded by the standby PW of first object PW or first object PW) forwarding, it can be forwarded by standby path.
Further, in one example, when the first PE equipment detects the 2nd PE equipment (or the 3rd PE equipment) failure
When recovery, such as the first PE equipment passes through public network Routing Protocol or LDP protocol aware to the 2nd PE equipment (or the 3rd PE equipment) event
Barrier restores, and the standby PW of first object PW, management PW, standby management PW and first object PW can be associated with by the first PE equipment again
To the first VN.
It should be noted that in embodiments of the present invention, (being such as updated to second by the first VN when updating the associated VN of PW
When VN), associated VN before update can be deleted, and PW is associated with to new VN；Alternatively, can increase in the incidence relation of record
One is added to be used to identify the whether available label of incidence relation, it, will be in the incidence relation before update as the associated VN of update PW
The value of label be set to the mark not available value of the incidence relation (such as Down), and by the label in updated incidence relation
Value is set to the mark available value of the incidence relation (such as UP).
For example, when needing incidence relation being associated with the 2nd VN by first object PW, first object PW, pipe are updated to
When reason PW, the standby standby PW for managing PW and first object PW are associated with a VN, it can delete first object PW's and the 2nd VN
Incidence relation, and the standby PW of first object PW, management PW, standby management PW and first object PW are associated with the first VN.
Again for example, when needing incidence relation by first object PW, management PW, standby management PW and first object PW
Standby PW be associated with the first VN, can be by first object PW, management PW, standby when being updated to first object PW and being associated with two VN
The value for managing the standby PW label corresponding with the incidence relation of the first VN of PW and first object PW is set to Down, and establishes first
The value of the corresponding label of the incidence relation is set to UP by the incidence relation of target PW and the 2nd VN；When need by incidence relation by
First object PW is associated with the 2nd VN, is updated to the pass standby PW of first object PW, management PW, standby management PW and first object PW
When being linked to a VN, the value of first object PW label corresponding with the incidence relation of the 2nd VN can be set to Down, and by
The value of the standby PW label corresponding with the incidence relation of the first VN of one target PW, management PW, standby management PW and first object PW
It is set to UP.
In order to make those skilled in the art more fully understand technical solution provided in an embodiment of the present invention, below with reference to specific
Application scenarios are illustrated technical solution provided in an embodiment of the present invention.
Fig. 2 is referred to, is a kind of configuration diagram of concrete application scene provided in an embodiment of the present invention, as shown in Fig. 2,
In the application scenarios, the business PW between PE1 and PE2 and the business PW between PE1 and PE3 form 1:1 redundancy protecting,
Business PW between PE1 and PE2 is main PW, the business PW between PE1 and PE3 be standby PW (i.e. PE1 is above-mentioned first PE equipment,
PE2 is above-mentioned 2nd PE equipment, and PE3 is above-mentioned 3rd PE equipment), the tunnel strategy of the business PW between PE1 and PE2 is homogeneous
Together, and binding management PW (i.e. business PW between PE1 and PE2 is above-mentioned first object PW), the business between PE1 and PE3
The tunnel strategy of PW is also all the same, and customer network edge (English: Customer Edge, abbreviation: CE) equipment 1 passes through PE1 and accesses
Public network, CE2 access public network by PE2 and PE3.
Based on application scenarios shown in Fig. 2, active and standby PW handover scheme provided in an embodiment of the present invention is accomplished by
1, a pair of active and standby PW (business PW) is mutually redundant protection, forms one group of PW redundancy protecting；
2, being abstracted virtual next-hop a VN1, VN1 includes the corresponding next-hop of main PW (i.e. main next-hop), standby PW correspondence
Next-hop (i.e. slave next-hop) and a Flag；When the value of Flag is Main, PE1 uses main next-hop converting flow
(i.e. to PE2 converting flow)；When the value of Flag is Backup, PE1 is using slave next-hop converting flow (i.e. to PE3 forwarding flow
Amount)；
3, in networking shown in Fig. 2, a plurality of (can be big specification, such as 32K) business PW forms PW redundancy protecting, due to master
The opposite end PE equipment (PE2) and tunnel strategy of PW is all the same, and therefore, the public network tunnel that main PW chooses is identical, i.e. main path phase
Together；Similarly, since the opposite end PE equipment (PE3) and tunnel strategy of standby PW are all the same, the public network tunnel phase that standby PW chooses
Together, i.e., identical for path, therefore, these PW redundancy protecting groups (including main business PW and standby business PW) are associated with VN1；
4, management PW configures a standby PW (i.e. standby management PW), and management PW and standby management PW are mutually redundant protection, form one
Group PW redundancy protecting；Since the opposite end PE equipment of management PW is PE2, the opposite end PE equipment of main PW is also PE2, that is, manages pair of PW
Hold PE equipment identical as the opposite end PE equipment of main PW, the opposite end PE equipment PE3 of the opposite end PE equipment PE3 and standby PW of standby management PW
For identical equipment, therefore, the redundancy protecting group of management PW and standby management PW can also be associated with VN1；
5, the BFD session for management PW is established；
6, when PE1, which is based on BFD session, detects management PW failure, PE1 updates the value of the Flag of VN1, by it by Main
It is updated to Backup, i.e. the flow of all business PW is switched to standby path forwarding (forwarding by PE1 → PE3) on PE1；
7, when PE1 be based on BFD session detect management PW fault recovery when, PE1 update VN1 Flag value, by its by
Backup reverts to Main, i.e. the equal switchback main path forwarding (being forwarded by PE1 → PE2) of the flow of all business PW on PE1；
8, standby such as by public network Routing Protocol or LDP protocol detection to PE3 failure when PE1 detects PE3 failure
Public network tunnel on path is deleted, and standby PW is due to that can not choose public network tunnel and Down, at this point, only main PW (i.e. main business
PW) energy converting flow, i.e., cannot form PW redundancy protecting.At this point, PE1 can be abstracted virtual next-hop a VN2, VN2 again
For main next-hop (i.e. PE2), main PW is associated with the VN2；
9, main such as by public network Routing Protocol or LDP protocol detection to PE2 failure when PE1 detects PE2 failure
Public network tunnel on path is deleted, and main PW is due to that can not choose public network tunnel and Down, at this point, only standby PW is (i.e. for business
PW) energy converting flow, i.e., cannot form PW redundancy protecting.At this point, PE1 can be abstracted virtual next-hop a VN3, VN3 again
For slave next-hop (i.e. PE3), standby PW is associated with the VN3；
Wherein, in this embodiment, PW can be as shown in Figure 3 with the schematic diagram that is associated with of VN.
10, when PE1 detects PE2 (or PE3) fault recovery, active and standby PW energy converting flow forms PW redundancy again
Protection, at this point it is possible to which main PW, management PW and corresponding standby PW are associated with VN1 again, the value of the Flag of VN1 is set as
Main, the flow of all business PW are forwarded by main path.
Through above description as can be seen that in technical solution provided in an embodiment of the present invention, by being configured for management PW
Corresponding standby management PW, and the standby PW of the main PW for managing PW binding, management PW, standby management PW and main PW are associated with including master
The corresponding main next-hop of PW passes through main next-hop or slave next-hop converting flow for the corresponding slave next-hop of PW and for identifying
The VN of Flag the switching of active and standby PW can be realized by updating the value of Flag in the VN in turn, reduce active and standby PW switching
Time-consuming reduces the probability of packet loss in active and standby PW handoff procedure.
Fig. 4 is referred to, provides a kind of structural schematic diagram of active and standby PW switching device for the embodiment of the present invention, wherein the dress
The first PE equipment that can be applied in above method embodiment is set, as shown in figure 4, the active and standby PW switching device may include:
Associative cell 410 is used for the first object PW, the management PW, the standby management PW and described first
The standby PW of target PW is associated with the first virtual next-hop VN；First VN includes main next-hop, slave next-hop and the first Flag,
The main next-hop is the corresponding next-hop of the first object PW, and the slave next-hop is standby PW pair of the first object PW
The next-hop answered；
Detection unit 420, for based on BFD session detection management PW whether failure；
Updating unit 430, for when based on BFD session detect the management PW failure when, will be in the first VN
The value of first Flag is updated to second value by the first value；
Wherein, when the detection unit detects that the value of the first Flag is first value, the first PE is set
It is standby that flow forwarding is carried out by the main next-hop；When the value of the first Flag is the second value, the first PE is set
It is standby that flow forwarding is carried out by the slave next-hop.
In an alternative embodiment, the updating unit 430 is also used to detect when the detection unit is based on BFD session
When the management PW fault recovery, the value of the first Flag in the first VN is updated to described by the second value
One value.
In an alternative embodiment, the associative cell 410 is also used to detect that the 3rd PE is set when the detection unit
When standby failure, the first object PW is associated with the 2nd VN, the 2nd VN is the main next-hop.
In an alternative embodiment, the associative cell 410 is also used to detect that the 2nd PE is set when the detection unit
When standby failure, the standby PW of the first object PW is associated with the 3rd VN, the 3rd VN is the slave next-hop.
In an alternative embodiment, the associative cell 410 is also used to detect that the 2nd PE is set when the detection unit
When standby fault recovery, or, when the 3rd PE equipment fault restores, by the first object PW, the management PW, the standby pipe
The standby PW of the reason PW and first object PW is associated with the first VN again.
Fig. 5 is referred to, is a kind of hardware structural diagram of active and standby PW switching device provided in an embodiment of the present invention.The master
Standby PW switching device may include processor 501, the machine readable storage medium 502 for being stored with machine-executable instruction.Processing
Device 501 can be communicated with machine readable storage medium 502 via system bus 503.Also, by reading and executing machine readable deposit
Machine-executable instruction corresponding with active and standby PW switch logic in storage media 502, processor 501 can be performed above-described active and standby
PW switching method.
Machine readable storage medium 502 referred to herein can be any electronics, magnetism, optics or other physical stores
Device may include or store information, such as executable instruction, data, etc..For example, machine readable storage medium can be easily
Lose memory, nonvolatile memory or similar storage medium.Specifically, machine readable storage medium 502 can be RAM
(Radom Access Memory, random access memory), flash memory, memory driver (such as hard disk drive), solid state hard disk,
Any kind of storage dish (such as CD, DVD) perhaps similar storage medium or their combination.
The embodiment of the invention also provides a kind of machine readable storage mediums including machine-executable instruction, such as Fig. 5
In machine readable storage medium 502, the machine-executable instruction can execute by the processor 501 in active and standby PW switching device
To realize active and standby PW switching method described above.
The function of each unit and the realization process of effect are specifically detailed in the above method and correspond to step in above-mentioned apparatus
Realization process, details are not described herein.
For device embodiment, since it corresponds essentially to embodiment of the method, so related place is referring to method reality
Apply the part explanation of example.The apparatus embodiments described above are merely exemplary, wherein described be used as separation unit
The unit of explanation may or may not be physically separated, and component shown as a unit can be or can also be with
It is not physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to actual
The purpose for needing to select some or all of the modules therein to realize the present invention program.Those of ordinary skill in the art are not paying
Out in the case where creative work, it can understand and implement.
As seen from the above-described embodiment, by configuring corresponding standby management PW for management PW, and by manage PW binding main PW,
Management PW, the standby standby PW for managing PW and main PW are associated with including the corresponding main next-hop of main PW, the standby corresponding slave next-hop of PW
And the VN for identifying the Flag by main next-hop or slave next-hop converting flow in turn can be by updating in the VN
The value of Flag realizes the switching of active and standby PW, reduces the time-consuming of active and standby PW switching, reduces packet loss in active and standby PW handoff procedure
Probability.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (10)
1. a kind of active/standby pseudo wires switching method is set applied to the first service provider network edge PE in active/standby pseudo wires PW networking
Standby, business PW between the first PE equipment and the 2nd PE equipment is main PW, the first PE equipment and the 3rd PE equipment it
Between business PW be standby PW, the first object PW between the first PE equipment and the 2nd PE equipment binds same management
PW, the first object PW are the identical a plurality of PW of tunnel strategy, and establishing on the management PW has two-way converting to detect BFD meeting
Words, which is characterized in that for the management PW configured with corresponding standby management PW, the standby management PW and first object PW's is standby
PW homologous chummage PW each other, which comprises
The standby PW of the first object PW, the management PW, the standby management PW and first object PW are associated with the
One virtual next-hop VN；First VN includes main next-hop, slave next-hop and the first label F lag, and the main next-hop is institute
The corresponding next-hop of first object PW is stated, the slave next-hop is the corresponding next-hop of standby PW of the first object PW；
When detecting the management PW failure based on BFD session, by the value of the first Flag in the first VN by the
One value is updated to second value；
Wherein, when the value of the first Flag is first value, the first PE equipment is carried out by the main next-hop
Flow forwarding；When the value of the first Flag is the second value, the first PE equipment is carried out by the slave next-hop
Flow forwarding.
2. the method according to claim 1, wherein the value by the first Flag in the first VN
It is updated to after second value by the first value, further includes:
When detecting the management PW fault recovery based on BFD session, by the value of the first Flag in the first VN
First value is updated to by the second value.
3. the method according to claim 1, wherein the method also includes:
When detecting the 3rd PE equipment fault, the first object PW is associated with the 2nd VN, the 2nd VN is institute
State main next-hop.
4. according to the method described in claim 1, be wherein, the method also includes:
When detecting the 2nd PE equipment fault, the standby PW of the first object PW is associated with the 3rd VN, the third
VN is the slave next-hop.
5. the method according to claim 3 or 4, which is characterized in that the method also includes:
When detecting that the 2nd PE equipment fault restores, or, when the 3rd PE equipment fault restores, by first mesh
Mark PW, the management PW, the standby standby PW for managing the PW and first object PW are associated with the first VN again.
6. a kind of active/standby pseudo wires switching device is set applied to the first service provider network edge PE in active/standby pseudo wires PW networking
Standby, business PW between the first PE equipment and the 2nd PE equipment is main PW, the first PE equipment and the 3rd PE equipment it
Between business PW be standby PW, the first object PW between the first PE equipment and the 2nd PE equipment binds same management
PW, the first object PW are the identical a plurality of PW of tunnel strategy, and establishing on the management PW has two-way converting to detect BFD meeting
Words, which is characterized in that for the management PW configured with corresponding standby management PW, the standby management PW and first object PW's is standby
Homologous chummage PW, described device include: PW each other
Associative cell, for by the first object PW, the management PW, the standby management PW and first object PW
Standby PW is associated with the first virtual next-hop VN；First VN includes main next-hop, slave next-hop and the first label F lag, described
Main next-hop is the corresponding next-hop of the first object PW, and the slave next-hop is that the standby PW of the first object PW is corresponding
Next-hop；
Detection unit, for based on BFD session detection management PW whether failure；
Updating unit, for when based on BFD session detect the management PW failure when, by described first in the first VN
The value of Flag is updated to second value by the first value；
Wherein, when the detection unit detects that the value of the first Flag is first value, the first PE equipment is logical
It crosses the main next-hop and carries out flow forwarding；When the value of the first Flag is the second value, the first PE equipment is logical
It crosses the slave next-hop and carries out flow forwarding.
7. device according to claim 6, which is characterized in that
The updating unit is also used to when the detection unit detects the management PW fault recovery based on BFD session, will
The value of the first Flag in first VN is updated to first value by the second value.
8. device according to claim 6, which is characterized in that
The associative cell is also used to when the detection unit detects the 3rd PE equipment fault, by first mesh
Mark PW is associated with the 2nd VN, and the 2nd VN is the main next-hop.
9. device according to claim 6, which is characterized in that
The associative cell is also used to when the detection unit detects the 2nd PE equipment fault, by first mesh
The standby PW of mark PW is associated with the 3rd VN, and the 3rd VN is the slave next-hop.
10. device according to claim 8 or claim 9, which is characterized in that
The associative cell is also used to when the detection unit detects that the 2nd PE equipment fault restores, or, described the
When three PE equipment faults restore, by the first object PW, the management PW, the standby management PW and first object PW
Standby PW be associated with the first VN again.
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| CN110740094A (en) * | 2019-10-28 | 2020-01-31 | 新华三信息安全技术有限公司 | network equipment, BFD message transmission method and device |
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